<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
        .video-loading{
            width: 100vw;
            height: 5px;
            position: fixed;
            bottom: 0;
        }
        .video-loading .line{
            width: 2vw;
            height:4px;
            margin: 0 auto;
            border-radius:2px;
            background-color: #FF6277;
            animation: videoloading .3s linear ; 
            -webkit-animation: videoloading .6s linear infinite; 
        }
        @keyframes videoloading{
            0%{
                width: 2vw;
                opacity: 1;
            }
            100%{
                width: 100vw;
                opacity: .3;
            }
        }
        @-webkit-keyframes videoloading{
            0%{
                width: 2vw;
            }
            100%{
                width: 100vw;
            }
        }
    
    
    </style>
</head>
<body>
    <div class="video-loading">
        <div class="line"></div>
    </div>
</body>
</html>